Biology, asked by samthestar15, 11 months ago

what is the role of valves in human respiratory system

Answers

Answered by Anonymous
0

Explanation:

The heart consists of four chambers, two atria (upper chambers) and two ventricles (lower chambers). There is a valve through which blood passes before leaving each chamber of the heart. The valves prevent the backward flow of blood.

Answered by nihaal66
0

Answer:

valves are very close to heart, when our blood comes to left ventricle it gets open, it works like door

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